1 sandwiches_orders = ['apple','banana','mango',"apple","watermelon"] 2 finished_sandwiches = [] 3 while "apple" in sandwiches_orders: 4 sandwiches_orders.remove("apple") 5 print("sorry ,The apple is sold out!/nyour ordered are:") 6 print(sandwiches_orders) 7 while sandwiches_orders: 8 print("please wait for a moment,i'm making "+sandwiches_orders[0]+" for you.") 9 finished_sandwiches.append(sandwiches_orders[0]) 10 del sandwiches_orders[0] 11 print("your ordered are finished:") 12 for sandwiche in finished_sandwiches: 13 print(" "+str(sandwiche))
上述代码的功能是：检查sandwiches_orders列表中是否有"apple"，如果有，则删除apple，打印剩余的水果，并将其逐个添加到finished_sandwiches中，并将其在sandwiches_orders中删除，需要注意的是，这里先打印谁，就先添加谁,更加符合实际点餐先来先到的情况。所以没有采用.pop（）类